Acid wool dyestuffs of the anthraquinone series



Patented Nov. 11, 1930 UNITED STATES PATE-NT "owe:

GEoRG KRANZLEIN AND FRITZ RoEMER, or ERANKEoRr-oN-THE-MAm-HooHs'r, AND

ERICH KRONHOLZ, or BAD SODEN-ON-THE-TAUNUS, GERMANY, ASSIGNORS T0 GEN- ER L ANILINE woRKs, me, or NEW YORK, N. Y., A coRroRAr1oN- or DELAWARE ACID WOOL DYESTUFFS OF THE ANTHRAQUINONE SERIES No Drawing. Application filed December 19, 1928, SeriaLNo. 327,182,"and .in Germany December 23, 1927.

The present invention relates to acid wool dyestufis of the anthraquinone series and to a process of preparing them.

\Ve have found that valuable dyestuffs of a good leveling power are obtained, by causing a 1-amino-4-halogen-anthraquinone-2- sulfonic acid to react with a base of the general formula:

wherein X stands for an alkylor aralkyl group and Y stands for an aliphatic acylresidue, in the presence of copper or a copper compound while heating.

The new dyestuffs correspond to the general formula:

wherein X stands for an alkyl or aralkyl fioup, Y for an aliphatic acyl-residue and e for a metal or for hydrogen.

The following example serves to illustrate our invention, but it is not intended to limit it thereto, the parts being by weight.

(1) 4.0 parts of sodium l-amino-l-bromanthraquinone-Q-sulfonate are heated on the water-bath together with 25 parts of metaamino-methylacetanilide, 10 parts of sodium bicarbonate and 10 parts of a copper sulfate solution of 10% strength in 800 parts of water to C. to 80 C. and the whole is kept at that temperature for 68 hours. The condensation product is, if required, purified by re-dissolving it, and the dyestuff is obtained in a beautiful crystalline form, being, when dry, a blue powder and dissolving in water to a blue solution.

Instead of meta-amino-methylacetanilide there may also be used meta-amino-methylformanilide in the preceding example, there may likewise be used other alkyl derivatives with the same advantage, such as for instance the bases which are ethylated or benzylated or substituted by a hydro-aromaticresidue' in I the acyl-amino-group.

In the following claims the term copper catalyst is intended to comprise not only wherein X stands for an alkyl or aralkyl group, Y for an aliphatic acyl-residue and Me for a metal or for hydrogen, said dyestufi's being, when dry, a blue powder and dissolving in water to a blue solution.

.55 the metal itself. but'also copper compounds,

2. As new products, the dyestuffs of the following constitution:

wherein Y stands for an aliphatic acyl-residue and Me for a metal or for hydrogen, said dyestufis being, when dry, a blue powder and dissolving in water to a blue solution.

3. As new products, the dyestuffs of the following constitution:

80;.Me /N NH: I I

' Y-N-OHI wherein Y stands for an aliphatic acyl-residue and Me for a metal or for hydrogen,

{Q 1 om-o-Ni-QHQ solution.

' following composition:.

said dyestuifs being, ivvh n dry, a blu powder 7 r and dissolving in water to ablue solution.

4'. As new products, the dyestuffs of the. following Constitution: v V V v wherein Me-stands forn m'etai l or for' hydio-" I gen, said dyo stu fi's being, :When dry, a blue poWdr'an-d' dissolving in WaterIto a/blue' a, new PrOduot, 'the" d ye s tnfi of the i omii N om in id estn ibe gss hen yi adiillieipoiidei' Y 'et'nd dissolvingin Wa ter to a blue solution.

=In testimony whereof, We aflix our signatures. V

I s 'GEORG' KRANZLEIN. FRITZ BOEMER; r

i EBICH' KRONHOLZ.

Certificate of Correction Patent No. 1,7 80,97 6. Granted November 11, 193mm) GEORG KRANZLEIN ET AL.

It is hereby certified that error appears in the printed specification of the above numbered patent requiring correction as follows: Page 2, first line of formula, claim 5, for the symbol SOQ/Ia read SO .Na; and that the said Letters Patent should be read with this correction therein that the same may conform to the record of the case in the Patent Office. 7

I Signed and sealed this 30th day of December, A. D. 1930.

[SEAL] M. J. MOORE, Acting Commissioner of Patents. 

